Moving sound picture film



DCC. 8, 1931. EI SPQNABLE 1,835,536

MOVING SOUND PICTURE FILM Filed Dec. 14, 1928 MVT/V555.

atented ec. '193i ATENT OFFICE I. SPNELE, 0F NEW YORK, N. Y..

MVJNG SUND FCUIURE IFILM .Application filed lilccember it, 1928. SerialNo. 326,012..

'llhis invention relates to certain new and useful improvements inmoving sound picture film, or so-called talking moving picture film.

t lin the past it has been impossible to use film with a tinted base inthe production and reproduction of sound pictures inasmuch as thephoto-electric cell used in reproduction is more sensitive to certainparticular colors l@ than to others, as for instance, the usualphoto-electric cell is particularly sensitive to blue. Hence, when atinted stock of red, amber or yellow is used, the volume of thereproduced sound falls H materially. Furl@ ther, there is also adifference in the quality of the reproduction as compared to black andwhite nlm when tinted stock is used.

The object, therefore, of this invention is to provide a moving talkingpicture film in which the picture portion of the film is tinted withouta'ecting the normal substantial transparency or clearness of the soundtrack.

lin the drawings Figure 1 is a plan View of a section of a movingtalking picture film of this invention.

Figure 2 is a section on line 2 2, Figure l.

Figure 3 is a section similar to Figure 2 illustrating a film producedby a modified method.

Figure 4 is a View of a section of a lm having a tainted moving picturesection 'and an untinted sound track section.

is illustrated, a film may consist ot' a celluloid base -lto which thereis secured a sub-base -2- of such a. material as to cause the emulsionto cling or stick to the' cellulose nitrate, the usual gelatin layerbeing indicated at --3-.

in the manufacture of the film the celluloid base -1- is tinted orcolored in any suitable manner, as for inst-ance by moving the Celluloidstrip over an absorbent roll which contains the coloring matter. Duringthis step of the process the sound track fimay be covered in anysuitable manner so as to be protected from contact with the absorbentroll. ln this manner the picture portion -7- of the film may be providedwith a color coating -10- or may be tinted any desired color, while thesound track 6- retains its original untinted substantially transparentcondition. Thereafter the subbase and the gelatin layer may be appliedto the Celluloid base -'1- in the usual manner.

rlihe film so produced may be provided in the usual manner withconsecutive pictures -4- overlying the tinted portion of the celluloidbase -1-, while the sound record 5- may be produced in any usual mannerupon the sound track 6 which overlies the untinted portion of the base-1-. Such a film has all the advantages so far as the moving picture isconcerned of the usual tinted film while the sound record portion of thefilm has all of the usual advantages of a fund record upon the ordinaryuntinted ln Figure 3 a modified form of film isLA shown in that thepicture portion -7- of the film is formed independently of the soundtrack portion -6-, or the sound track portion may be cut from thepicture portion -7- prior to tinting the hase -1-. Thereafter the baseof the picture portion 7 m'ay be tinted a desired color, while the baseof the sound track portion remains untinted and the two portions arethen united or secured together in any suitable manner, as for instancethat disclosed in my co-pending application Serial No. 344,184.

As illustrated, the parts are out with inclined mating surfaces, andthese surfaces may be secured together bycany suitable adhesive. linthis manner the moving picture portion of the film may have a tintedbase -1-, while the sound track record has an unprinted base-portion l-.It may be that other methods of producing such a hlm may be devised, andl do not desire to restrict myself to the particular means b which theresult is secured, as various c anges y and modifications may be madewithin the scope of the appended claim.

lf claim:

A composite film comprising two longitudinal strips, one consisting of abase, a subbase secured thereto, a photo-sensitive layer secured to thesub-base to constitute an untinted sound track portion and the otherstrip consisting of a base, a sub-base secured thereto, aphoto-sensitive layer secured to the subbase, a coloring matter layersecured to the base, and means for securing the adjacent longitudinaledges of the strips together with the bases aligned to produce a unitaryarticle.

In witness whereof I have hereunto set my hand this 3rd day of December,1928.

EARL I. SPONABLE.

